HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 245)

229 HEIDENHAIN TNC 410, TNC 426, TNC 430
ROTATION (Cycle G73)
The TNC can rotate the coordinate system about the active datum
in the working plane within a program.
Effect
The ROTATION cycle becomes effective as soon as it is defined in
the program. It is also effective in the Positioning with MDI mode of
operation. The active rotation angle is shown in the additional
status display.
Reference axis for the rotation angle:
■ X/Y plane X axis
■ Y/Z plane Y axis
■ Z/X plane Spindle axis
Before programming, note the following:
An active radius compensation is canceled by defining
Cycle G73 and must therefore be reprogrammed, if
necessary.
After defining Cycle G73, you must move both axes of
the working plane to activate rotation for all axes.
ú Rotation: Enter the rotation angle H in degrees (°).
Input range: –360° to +360° (absolute G90 before H or
incremental G91 before H).
Cancellation
Program the G73 ROTATION cycle once again with a rotation angle
of 0°.
Example NC block:
N72 G73 G90 H+25*
Z
Z
X
X
Y
Y
8.9 Coor
dinat
e
T
ransf
or
mation Cy
cles
Kkap8.pm6 29.06.2006, 08:06 229